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❓ 题目 What is the main reason some scientists oppose formally recognizing the Anthropocene as a new geological epoch?

A. A. Human activities have not caused any measurable changes in Earth's systems.
B. B. The proposed markers, such as nuclear fallout, are not globally consistent or synchronous.
C. C. The term 'Anthropocene' is too metaphorical to be used in scientific classifications.
D. D. The transition from the Pleistocene to the Holocene was more significant than current changes.

B. The proposed markers, such as nuclear fallout, are not globally consistent or synchronous.